The domain within your query sequence starts at position 697 and ends at position 899; the E-value for the RPT_2 domain shown below is 1.17e-6.

QEQAQPSQQGLFQPQVALGSLPPNPMPQNQQGPIFQTQRPIVGMQSNSPSQEQQQQQQQQ
QQQQQQQQQQQQSILFSNQNAMATMASQKQPPPNMMFSPNQNPMASQEQQNQSIFHQQSN
MAPMNQEQQPMQFQNQPTVSSLQNPGPTQSESPQTSLFHSSPQIQLVQGSPSSQDQQVTL
FLSPASMSALQTSINQPDMQQSP

This is a significant internal repeat in the query protein sequence, as detected by the Prospero program.